Abstract
Most of resistance of a transport equipment is caused by a fluid frictional resistance. Decreasing the fluid frictionalresistance improve the fuel consumption of a transport equipment. This fluid frictional resistance increases if the hul l surface have roughness by coating material. In this research, we measure the velocity profiles in ZPG over the two dimensional rough surface, and measure the friction coefficient by using the integrated boundary layer equation. We compare the frictional resistance on rough surface with the frictional resistance on smooth surface. This process makes clear how the roughness affects a frictional resistance and a velocity profile.
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